The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 27, 2003
Filed:
Jul. 09, 2001
Applicant:
Inventors:
Assignee:
Futaba Corporation, Mobara, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B 3/314 ;
U.S. Cl.
CPC ...
H05B 3/314 ;
Abstract
A fluorescent display device capable of attaining gradation display while minimizing the number of types of phosphors. A glass substrate is formed thereon with anode electrodes, each of which has a phosphor film deposited thereon. The phosphor films include a phosphor film exhibiting a first kind of luminous hue, that exhibiting a second kind of luminous hue, and those exhibiting a mixed hue of both luminous hues. The mixed hue is varied by varying an area ratio between both luminous hues.